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diff --git a/examples/charts/nesteddonuts/widget.h b/examples/charts/nesteddonuts/widget.h
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+/****************************************************************************
+**
+** Copyright (C) 2014 Digia Plc
+** All rights reserved.
+** For any questions to Digia, please use contact form at http://qt.digia.com
+**
+** This file is part of the Qt Enterprise Charts Add-on.
+**
+** $QT_BEGIN_LICENSE$
+** Licensees holding valid Qt Enterprise licenses may use this file in
+** accordance with the Qt Enterprise License Agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and Digia.
+**
+** If you have questions regarding the use of this file, please use
+** contact form at http://qt.digia.com
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+#ifndef WIDGET_H
+#define WIDGET_H
+
+#include <QWidget>
+#include <QPieSeries>
+
+class QTimer;
+
+QT_CHARTS_USE_NAMESPACE
+
+class Widget : public QWidget
+{
+    Q_OBJECT
+
+public:
+    Widget(QWidget *parent = 0);
+    ~Widget();
+
+public slots:
+    void updateRotation();
+    void explodeSlice(bool exploded);
+
+private:
+    QList<QPieSeries *> m_donuts;
+    QTimer *updateTimer;
+};
+
+#endif // WIDGET_H